* {
  margin: 0;
  padding: 0;
}

body {
  background-color: #fee2c5;
}
.main {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

span {
  width: 10px;
  height: 80px;
  margin: 0 5px;
  border-radius: 50px;
}

span:nth-child(1) {
  background-color: #ff0000;
  animation: spotifyEffect 1.1s infinite;
}
span:nth-child(2) {
  background-color: #ff8d29;
  animation: spotifyEffect2 0.9s infinite;
}
span:nth-child(3) {
  background-color: #f7d716;
  animation: spotifyEffect 0.8s infinite;
}
span:nth-child(4) {
  background-color: #3e7c17;
  animation: spotifyEffect2 0.7s infinite;
}
span:nth-child(5) {
  background-color: #0e3eda;
  animation: spotifyEffect 0.5s infinite;
}
span:nth-child(6) {
  background-color: #5534a5;
  animation: spotifyEffect2 1.1s infinite;
}

@keyframes spotifyEffect {
  0%,
  100% {
    height: 30px;
  }
  50% {
    height: 80px;
  }
}

@keyframes spotifyEffect2 {
  0%,
  100% {
    height: 30px;
  }
  50% {
    height: 65px;
  }
}